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71.
Lacroix GL Constantinescu I Cousineau D de Almeida RG Segalowitz N Grünau Mv 《Brain and cognition》2005,57(2):115-119
The goal of this study was to evaluate the possibility that dyslexic individuals require more working memory resources than normal readers to shift attention from stimulus to stimulus. To test this hypothesis, normal and dyslexic adolescents participated in a Rapid Serial Visual Presentation experiment (Raymond, Shapiro, & Arnell, 1992). Surprisingly, the result showed that the participants with dyslexia produced a shallower attentional blink than normal controls. This result may be interpreted as showing differences in the way the two groups encode information in episodic memory. They also fit in a cascade-effect perspective of developmental dyslexia. 相似文献
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The P3(00) event-related potential (ERP) component is usually reported as having a centroparietal maximum. However, the P3 topography is more frontal in early-session trials which may be masked by averaging over the entire session and is evident longer into the test session among elderly subjects. This hyperfrontality is interpreted as a sign of poor prefrontal adaptive functioning. In the present study, P3 amplitude was examined in university students to determine how early a change in amplitude would be evident and the effect of task complexity on the amplitude across electrode sites. ERPs were elicited using a working-memory n-back task where participants pressed a key to target letter presentations in three conditions of increasing complexity. Single-trial ERP waveforms were then averaged in successive sequences of five trials. Results revealed a greater decrease in frontal P3 amplitude compared to the central and parietal P3 after the first block of five target trials until the third block. The results are interpreted as indicating rapid decrease in hyperfrontality with habituation to an easy task. Increases in task complexity (the 2-back paradigm), however, reduced this frontal P3 attenuation. Results support a P3 ERP model of hyperfrontality reflecting short-term adaptive function by the prefrontal cortex. 相似文献
73.
Daniel SJ Costa Rebecca Mercieca‐Bebber Claudia Rutherford Liam Gabb Madeleine T King 《Australian psychologist》2016,51(2):89-99
Cancer is now the biggest cause of mortality worldwide. Although the debilitating physical symptoms of cancer have long been known, the psychological and social impacts of cancer have become the subject of examination only relatively recently. The psychological outcomes that have been examined are primarily negative emotional variables, e.g., anxiety, but emerging research has focused on positive emotional variables, e.g., post‐traumatic growth, or cognitive outcomes. In this article, we provide a synthesis of reviews that have addressed the psychosocial impact of cancer. The framework for this synthesis is provided by a conceptualisation in which the presence of cancer impacts on psychosocial outcomes either directly or via mediating variables, including physical symptoms and treatment, and that this effect may be moderated by several variables, some characteristic of the person with cancer (demographic or personality‐related variables) and some characteristic of their environment (social support and medical variables). We also briefly examine the impact of cancer on the broader family unit following cancer diagnosis, treatment, survivorship and bereavement. We conclude that the heterogeneity of the cancer experience highlights the need for theoretically driven research and consistency in measurement approaches to determine mechanisms by which cancer exerts influence on psychosocial outcomes. This would allow development and delivery of targeted psychological interventions and a clearer delineation of the roles of the various parties, including clinical psychologists, family members and policymakers. 相似文献
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Providing free-field music input prompts right-handers to attend to their left side in a loudness-matching task that requires no musical analysis. Conversely, speech prompts rightward attention. The processes inferred are akin to the attentional asymmetry demonstrated in the syndrome of hemispatial neglect. 相似文献
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